Feeds

Sony to offer patch for 'rootkit' DRM

Fix removes cloaking, but not the 'rootkit'

The essential guide to IT transformation

Updated Sony BMG said today it will offer a patch for one of its own exploits - one that comes bundled with its music CDs.

The code cloaks itself and by intercepting and redirecting low level windows system calls, forces the audio through a custom player, and restricts the number of CD burns that can be made.

As Sys Internals' Mark Russinovich discovered this week, removing the Sony code using standard anti-malware tools leaves the user with an inoperable CD drive.

Russinovich also pointed out that because the cloaking technique it used to hide itself was so crude, malware authors could hide their own nefarious programs on users hard disks using Sony's DRM software.

However, the patch that Sony will offer doesn't remove the 'rootkit' DRM: it only makes the hidden files visible.

Macintosh and Linux users are unaffected by the DRM kit, which only works on Windows PCs.

It isn't quite the "bombs" the RIAA once suggested it was developing to deter music downloads, but it's in the same spirit.

And here's the patch from First 4 Internet Ltd, the British company that developed the DRM software .

"This Service Pack removes the cloaking technology component that has been recently discussed in a number of articles published regarding the XCP Technology used on SONY BMG content protected CDs." [our emphasis]

The note continues: "This component is not malicious and does not compromise security. However to alleviate any concerns that users may have about the program posing potential security vulnerabilities, this update has been released to enable users to remove this component from their computers."

But wait! Don't do that just yet...

Anti-malware company F-Secure discusses the Sony DRM software here. F-Secure says its rootkit detection software will spot the hidden files, but strongly advises users not to remove it using its Blacklight software, and instead advises users to contact Sony.

"If you find this rootkit from your system, we recommend you don't remove it with our products. As this DRM system is implemented as a filter driver for the CD drive, just blindly removing it might result in an inaccessible CD drive letter," advises F-Secure.

It is alarming how little outrage there is from ordinary PC users. While Register readers are well versed in the restrictions of DRM and the dangers of malware, there's little sign the public shares this knowledge.

Incredibly, the Sony DRM malware has been out on the market for eight months and is bundled on 20 CD titles. Sony said it hadn't received a single complaint until this week. So, disturbingly, most people either haven't run into serious problems yet, or even more disturbingly, don't find the Sony DRM particularly onerous. We pray it's not the latter.

However, Sony's decision to offer a 'patch' that fails to remove the DRM code suggests it isn't too concerned by the howls of outrage heard this week from sophisticated PC users.

And with this level of apathy, the music giants will be emboldened to try these techniques again. And again. And again. ®

Next gen security for virtualised datacentres

More from The Register

next story
e-Borders fiasco: Brits stung for £224m after US IT giant sues UK govt
Defeat to Raytheon branded 'catastrophic result'
Germany 'accidentally' snooped on John Kerry and Hillary Clinton
Dragnet surveillance picks up EVERYTHING, USA, m'kay?
Snowden on NSA's MonsterMind TERROR: It may trigger cyberwar
Plus: Syria's internet going down? That was a US cock-up
Who needs hackers? 'Password1' opens a third of all biz doors
GPU-powered pen test yields more bad news about defences and passwords
Think crypto hides you from spooks on Facebook? THINK AGAIN
Traffic fingerprints reveal all, say boffins
Rupert Murdoch says Google is worse than the NSA
Mr Burns vs. The Chocolate Factory, round three!
Microsoft cries UNINSTALL in the wake of Blue Screens of Death™
Cache crash causes contained choloric calamity
prev story

Whitepapers

5 things you didn’t know about cloud backup
IT departments are embracing cloud backup, but there’s a lot you need to know before choosing a service provider. Learn all the critical things you need to know.
Implementing global e-invoicing with guaranteed legal certainty
Explaining the role local tax compliance plays in successful supply chain management and e-business and how leading global brands are addressing this.
Build a business case: developing custom apps
Learn how to maximize the value of custom applications by accelerating and simplifying their development.
Rethinking backup and recovery in the modern data center
Combining intelligence, operational analytics, and automation to enable efficient, data-driven IT organizations using the HP ABR approach.
Next gen security for virtualised datacentres
Legacy security solutions are inefficient due to the architectural differences between physical and virtual environments.